CVE-2020-11043 : Security Advisory and Response

CVE-2020-11043, assigned by GitHub_M, relates to an out-of-bounds read vulnerability in FreeRDP version 2.0.0 or lower. The issue has been addressed in version 2.1.0.

Understanding CVE-2020-11043

What is CVE-2020-11043?

In FreeRDP versions less than or equal to 2.0.0, an out-of-bounds read occurs in rfx_process_message_tileset. When invalid data is provided to the RFX decoder, it leads to visual artifacts on the screen due to incorrect colors.

The Impact of CVE-2020-11043

This vulnerability allows attackers to read beyond the allocated memory, potentially exposing sensitive information or causing the application to crash.

Technical Details of CVE-2020-11043

Vulnerability Description

The vulnerability is classified as CWE-125: Out-of-bounds Read, indicating the issue of reading data beyond the bounds of allocated memory.

Affected Systems and Versions

Vendor: FreeRDP
Product: FreeRDP
Affected Versions: <= 2.0.0

Exploitation Mechanism

Attack Vector: Network
Attack Complexity: High
Privileges Required: High
User Interaction: None
Scope: Unchanged
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Low
CVSS Base Score: 2.2 (Low)

Mitigation and Prevention

Immediate Steps to Take

Update FreeRDP to version 2.1.0 or later to mitigate the vulnerability.
Monitor vendor advisories and security mailing lists for any further updates or patches.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network security measures to prevent unauthorized access.

Patching and Updates

Apply patches provided by FreeRDP to address the out-of-bounds read vulnerability.